Totally agree with wanting to see at C5: Alfred Molina, James Franco, Sam Neill, Jeff Goldblum, Leeanna Walsman, Ian McDiarmid, Bruce Campbell and Dolph Lundgren.
I'd also like to see:
Kelly Hu (Deathstrike, X2)
Alan Cumming (Nightcrawler, X2)
Nick Stahl (John, T3)
Frank Langella (Skeletor, Masters Of The Universe)
Lance Henriksen (Bishop, Aliens)
and any actors from the Scream trilogy especially:
Neve Campbell (Sidney)
Patrick Dempsey (Kincaid)
Parker Posey (Jennifer)
Liev Schreiber (Cotton)
Skeet Ulrich (Billy)
Matthew Lillard (Stu)
Jerry O'Connell (Derek)